1331103011243 has 4 divisors (see below), whose sum is σ = 1331154764448. Its totient is φ = 1331051258040.

The previous prime is 1331103011209. The next prime is 1331103011279. The reversal of 1331103011243 is 3421103011331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1331103011243 - 2⁸ = 1331103010987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331102011243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25838003 + ... + 25889468.

It is an arithmetic number, because the mean of its divisors is an integer number (332788691112).

Almost surely, 2^{1331103011243} is an apocalyptic number.

1331103011243 is a deficient number, since it is larger than the sum of its proper divisors (51753205).

1331103011243 is an equidigital number, since it uses as much as digits as its factorization.

1331103011243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51753204.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1331103011243 its reverse (3421103011331), we get a palindrome (4752206022574).

The spelling of 1331103011243 in words is "one trillion, three hundred thirty-one billion, one hundred three million, eleven thousand, two hundred forty-three".